* {
  margin: 0;
  padding: 0;
}
header {
  width: 100%;
  height: 820px;
  background-color: cadetblue;
}
header .top {
  width: 100%;
  height: 70px;
  background-color: #38414a;
}
header .top .top_con {
  position: relative;
  width: 990px;
  height: 70px;
  background-color: #38414a;
  margin: 0 auto;
}
header .top .top_con img {
  float: left;
}
header .top .top_con ul {
  position: absolute;
  left: 188px;
  top: 20px;
  float: left;
  font-size: 22px;
  width: 138px;
  height: 30px;
  background-color: #ffffff;
  border-radius: 5px;
  background: url("../img_weixin/angle.png") no-repeat;
  background-position: 120px 15px;
}
header .top .top_con ul li {
  list-style: none;
  display: none;
}
header .top .top_con ul li:nth-child(1) {
  border-left: 1px solid #121c26;
  display: block;
}
header .top .top_con ul li:nth-child(1) a {
  color: green;
}
header .top .top_con ul li a {
  display: block;
  padding-left: 10px;
  padding-top: 2px;
  padding-bottom: 2px;
  line-height: 30px;
  color: white;
  text-decoration: none;
}
header .top .top_con ul:hover {
  width: 138px;
  height: 150px;
  background-color: #ffffff;
  background: url("../img_weixin/angle2.png") no-repeat;
  background-position: 120px 15px;
  background-color: rgba(0, 0, 0, 0.5);
}
header .top .top_con ul:hover li {
  display: block;
}
header .top .top_con .input {
  float: right;
  margin-top: 20px;
  width: 430px;
  height: 33px;
  background-color: #ffffff;
  border: 1px solid cadetblue;
}
header .top .top_con .input input[type=text] {
  width: 380px;
  height: 33px;
  background-color: #bdc0c3;
  float: left;
  border: none;
  outline: none;
  padding-left: 10px;
  box-sizing: border-box;
}
header .top .top_con .input input[type=button] {
  background: url("../img_weixin/search.png") no-repeat;
  background-position: 15px 8px;
  width: 50px;
  height: 33px;
  background-color: #04b141;
  float: left;
  border: none;
}
header .nav {
  width: 100%;
  height: 35px;
  background-color: #04b141;
}
header .nav .nav_con {
  width: 990px;
  height: 35px;
  background-color: #04b141;
  margin: 0 auto;
}
header .nav .nav_con ul {
  top: 0;
  left: 0;
  width: 660px;
  height: 35px;
  background-color: #ffffff;
}
header .nav .nav_con ul li {
  float: left;
  list-style: none;
  width: 110px;
  height: 35px;
  background-color: #00ff00;
  line-height: 35px;
}
header .nav .nav_con ul li a {
  text-align: center;
  text-decoration: none;
  color: #fff2b7;
}
header .nav {
  width: 100%;
  height: 35px;
  background-color: #04b141;
}
header .content {
  width: 100%;
  height: 320px;
  background-color: #f0f0f0;
}
header .big_pic {
  width: 100%;
  height: 395px;
  background-color: #ffffff;
}
footer {
  width: 100%;
  height: 520px;
  background-color: #ffffff;
}
